We have entered the tube head from the back. The rubberized pouch
was lifted out. The thin, yellowish oil filling the tube head makes
the images of the plastic container and other components a little
hazy.

The plastic
container and it's contents were next lifted out.

THE
INSIDE IS FINALLY OUT!

The
x-ray tube, where all the action takes place, is seen in it's pristine
glory resting on the coils of a step-up transformer. The white shining
armour seen on the top is the insulating paper, while the thermal
cut-out (light blue round) can be seen peeping from the left top
corner of the picture. The yellow wires form the low-tension circuit
(coming out at the lower end of the glass envelope), while the high-tension
circuit is formed by the red and the white wires (on the left and
the right of the envelope).

The
tube head opened up so far was preserved for display and teaching
purpose. Yet another tube (defunct, of course!) was similarly opened
up and dissected further (seen below).

The
glass envelope containing cathode and anode was separated from the
circuitry and cut open (not very cleanly, though!). Infact, when
an attempt was made to cut it, it exploded, shattering into pieces.

The cut
ends were rounded off and the cathode and anode photographed. The
picture below shows the cathode end of the glass envelope.

Two yellow
leads of the low-tension circuit went to a resistor (seen as a green
tube in a picture above).The red lead is a part of the high-tension
circuit. The circuit is completed by a white lead (in a plastic sleeve)
seen entering the step-up transformer in a picture above.

The anode,
made up of copper stem and tungsten focal spot is seen through the
glass envelope. The round opening in the copper stem is the 'window'
through which the x-ray beam emerges. Through this 'window',
the sloping surface of the tungsten focal spot is visible. Yet another
opening is seen in the face of the copper stem (facing the cathode).
This opening allows the high-speed electrons coming from the cathode
to reach the focal spot.